Control Resources for Bandwidth-Restricted Wireless Devices

Abstract

A network node (560) transmits (110) broadcast information (201) which indicates a set (202) of control resource elements. The network node transmits (120) first control information in the set of control resource elements. The first control information schedules a first downlink message (203). The network node transmits (130) second control information in a subset (204) of the set of control resource elements for use by a bandwidth-restricted wireless device. The subset of the set of control resource elements has a smaller bandwidth than the set of control resource elements. The second control information schedules a second downlink message (205). A wireless device (510) performs an associated method (400).

1 .- 81 . (canceled) 
     
     
         82 . A method performed by a network node of a wireless network, the method comprising:
 transmitting broadcast information including a master information block (MIB) that indicates a set of control resource elements;   transmitting, in the set of control resource elements, first control information for use by wireless devices capable of supporting a bandwidth of the set of control resource elements, wherein the first control information schedules a first downlink message that is a system information block type 1 (SIB1); and   transmitting, in a subset of the set of control resource elements, second control information for use by bandwidth-restricted wireless devices, wherein the subset of the set of control resource elements has a smaller bandwidth than the set of control resource elements, and wherein the second control information schedules a second downlink message.   
     
     
         83 . The method of  claim 82 , wherein:
 the first downlink message comprises configuration information for an initial bandwidth part (BWP) for a first type of wireless devices;   the second downlink message comprises configuration information for an initial BWP for a second type of wireless devices; and   the initial BWP for the second type of wireless devices has a smaller bandwidth than the initial BWP for the first type of wireless devices.   
     
     
         84 . The method of  claim 82 , wherein the set of control resource elements is a control resource set number 0 (CORESET #0). 
     
     
         85 . The method of  claim 82 , wherein:
 the set of control resource elements has a bandwidth greater than 10 MHz, and   the subset of the set of control resource elements has a bandwidth of 10 MHz or less.   
     
     
         86 . The method of  claim 82 , wherein the second control information is transmitted with a higher repetition factor than the first control information. 
     
     
         87 . The method of  claim 82 , wherein the second control information is transmitted with a higher power level than the first control information. 
     
     
         88 . The method of  claim 82 , wherein the second control information is transmitted with a lower code rate than the first control information. 
     
     
         89 . The method of  claim 82 , wherein one or more of the following applies:
 the first downlink message includes configuration information for a random access channel; and   the second downlink message is a random access response message.   
     
     
         90 . The method of  claim 82 , wherein the second downlink message is a paging message. 
     
     
         91 . The method of  claim 82 , wherein the second downlink message is a system information block for bandwidth-restricted wireless devices. 
     
     
         92 . A method performed by a bandwidth-restricted wireless device configured to operate in a wireless network, the method comprising:
 receiving, from a network node of the wireless network, broadcast information including a master information block (MIB) that indicates a set of control resource elements for downlink transmission of first control information for use by wireless devices capable of supporting a bandwidth of the set of control resource elements, wherein the first control information schedules a first downlink message that is a system information block type 1 (SIB1); and   receiving from the network node second control information in a subset of the set of control resource elements, wherein the subset of the set of control resource elements has a smaller bandwidth than the set of control resource elements, and wherein the second control information schedules a second downlink message.   
     
     
         93 . The method of  claim 92 , wherein the bandwidth of the subset of the set of control resource elements is less than or equal to a maximum bandwidth supported by the bandwidth-restricted wireless device. 
     
     
         94 . The method of  claim 92 , wherein the set of control resource elements is a control resource set number 0 (CORESET #0). 
     
     
         95 . The method of  claim 92 , wherein:
 the set of control resource elements has a bandwidth greater than 10 MHz, and   the subset of the set of control resource elements has a bandwidth of 10 MHz or less.   
     
     
         96 . The method of  claim 92 , wherein the second control information is transmitted with one or more of the following:
 a higher repetition factor than the first control information.   a higher power level than the first control information.   a lower code rate than the first control information.   
     
     
         97 . The method of  claim 92 , wherein one or more of the following applies:
 the first downlink message includes configuration information for a random access channel; and   the second downlink message is a random access response message.   
     
     
         98 . The method of  claim 92 , wherein the second downlink message is a paging message. 
     
     
         99 . The method of  claim 92 , wherein the second downlink message is a system information block. 
     
     
         100 . A network node of a wireless network, the network node comprising:
 communication interface circuitry configured to communicate with wireless devices; and   processing circuitry operably coupled to the communication interface circuitry, whereby the processing circuitry and the communication interface circuitry are configured to perform operations corresponding to the method of  claim 82 .   
     
     
         101 . A bandwidth-restricted wireless device configured to operate in a wireless network, the bandwidth-restricted wireless device comprising:
 communication interface circuitry configured to communicate with a network node of the wireless network; and   processing circuitry operably coupled to the communication interface circuitry, whereby the processing circuitry and the communication interface circuitry are configured to perform operations corresponding to the method of  claim 92 .